Product set composed of a main tester, a receiver and 8 remote identifiers;Multiple tester ports, RJ45, RJ45 Loopback, RJ11 & BNC.;Tracking & checking 5E, 6E, USB cable, coaxial cable and telephone line, open circuit, short circuit, jumper wire, reverse connection or cross-talk interference.;Dynamically calibrating cable length and making length measurement;Locating cable with 8 far-end passive test jacks (ID 1- ID 8)